+from .models import *
+from . import app
+import random, string, os, imghdr, user_agents
+from urllib.parse import urljoin
+from werkzeug.datastructures import MultiDict
+
+# These are given to Jinja in template_filters.py
+
+def abs_url_for(path, **kwargs):
+ scheme = "https" if app.config["BASE_URL"][:5] == "https" else "http"
+ return url_for(path, _external=True, _scheme=scheme, **kwargs)
+
+def abs_url(path):
+ return urljoin(app.config["BASE_URL"], path)
+
+def url_set_query(**kwargs):
+ args = MultiDict(request.args)
+
+ for key, value in kwargs.items():
+ if key == "_add":
+ for key2, value_to_add in value.items():
+ values = set(args.getlist(key2))
+ values.add(value_to_add)
+ args.setlist(key2, list(values))
+ elif key == "_remove":
+ for key2, value_to_remove in value.items():
+ values = set(args.getlist(key2))
+ values.discard(value_to_remove)
+ args.setlist(key2, list(values))
+ else:
+ args.setlist(key, [ value ])
+
+
+ dargs = dict(args.lists())
+
+ return url_for(request.endpoint, **dargs)
+
+def get_int_or_abort(v, default=None):
+ if v is None:
+ return default
+
+ try:
+ return int(v or default)
+ except ValueError:
+ abort(400)
+
+def is_user_bot():
+ user_agent = request.headers.get('User-Agent')
+ if user_agent is None:
+ return True
+
+ user_agent = user_agents.parse(user_agent)
+ return user_agent.is_bot